This disclosure describes various methods, systems, and devices related to dynamic service node discovery in a network. In an example method, an intermediary node receives a Link Layer Discovery Protocol (LLDP) message from a first node. The LLDP message includes a discovery Type-Length-Value (TLV) that indicates a location of a service node in the network. The method further includes forwarding the LLDP message to a second node.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method, comprising: receiving, from a first node in a network, a Link Layer Discovery Protocol (LLDP) message comprising: a discovery Type-Length-Value (TLV) that indicates an identifier of a service node in the network, and a hopcount TLV comprising a counter; decreasing the counter in the hopcount TLV; in response to decreasing the counter, confirming that the counter is greater than zero; and forwarding, to a second node in the network, the LLDP message.
2. The method of claim 1 , wherein the discovery TLV is a type 127 TLV with a value indicating the identifier of the service node, and wherein the hopcount TLV is a type 127 TLV with a value comprising the counter.
3. The method of claim 1 , wherein the first node is the service node.
4. The method of claim 1 , wherein the second node is a leaf node in a spine-leaf network.
5. The method of claim 1 , wherein at least one of the first node or the second node comprises an intermediary node in a cluster network.
6. The method of claim 1 , wherein the identifier of the service node comprises at least one of an Internet Protocol (IP) address of the service node, a Media Access Control (MAC) address of the service node, or a Domain Name Service (DNS) name of the service node.
7. The method of claim 1 , wherein the discovery TLV further comprises at least one of a type of the service node, a memory capacity of the service node, or a processing capability of the service node.
8. The method of claim 1 , wherein the LLDP message is a first LLDP message, the operations further comprising: upon expiration of a predetermined period after transmitting the first LLDP message to the second node, transmitting a second LLDP message indicating the identifier of the service node to the intermediary node.
9. The method of claim 1 , wherein at least one of the first node or the second node is comprised in a cluster network.
10. A service node, comprising: at least one processor; and memory storing instructions that, when executed by the at least one processor, cause the processor to perform operations comprising: generating a first Link Layer Discovery Protocol (LLDP) message comprising a discovery Type-Length-Value (TLV) that indicates an identifier of the service node; and transmitting the first LLDP message to an intermediary node; and upon expiration of a predetermined period after transmitting the first LLDP message to the intermediary node, transmitting a second LLDP message indicating the identifier of the service node to the intermediary node.
11. The service node of claim 10 , wherein the operations further comprise: connecting to the intermediary node, wherein transmitting the first LLDP message is in response to connecting to the intermediary node.
12. The service node of claim 10 , wherein the first LLDP message further comprises a hopcount TLV that comprises a counter.
13. The service node of claim 12 , wherein the discovery TLV is a type 127 TLV with a value indicating the address of the service node, and wherein the hopcount TLV is a type 127 TLV with a value comprising the counter.
14. The service node of claim 10 , wherein the identifier of the service node comprises at least one of an Internet Protocol (IP) address of the service node, a Media Access Control (MAC) address of the service node, or a Domain Name Service (DNS) name of the service node.
15. The service node of claim 10 , wherein the discovery TLV further comprises at least one of a type of the service node, a memory capacity of the service node, or a processing capability of the service node.
16. An intermediary node in a cluster network, the intermediary node comprising: at least one processor; and memory storing instructions that, when executed by the at least one processor, cause the at least one processor to perform operations comprising: receiving, from a previous node in the cluster network, a Link Layer Discovery Protocol (LLDP) message comprising a discovery Type-Length-Value (TLV) and a hopcount TLV, the discovery TLV comprising an identifier of a service node in the network, the hopcount TLV comprising a counter; decreasing the counter in the hopcount TLV; in response to decreasing the counter, confirming that the counter is greater than zero; and forwarding the LLDP message to at least one next node.
17. The intermediary node of claim 16 , wherein the previous node in the cluster network is the service node or another intermediary node in the cluster network.
18. The intermediary node of claim 16 , wherein the at least one next node comprises at least one of another intermediary node in the cluster network or a leaf node in in a spine-leaf network.
19. The intermediary node of claim 16 , wherein the intermediary node is disposed between the previous node in the cluster network and a leaf node in a spine-leaf network.
20. The intermediary node of claim 16 , wherein the discovery TLV is a type 127 TLV with a value indicating the address of the service node, and wherein the hopcount TLV is a type 127 TLV with a value comprising the counter.
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October 10, 2019
August 10, 2021
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